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目的:建立人上颌第二磨牙三维有限元模型。方法:将离体上颌第二磨牙经螺旋CT扫描,使实体结构的断面图像数字化处理后输入计算机,建立实体三维有限元模型。结果:在计算机上建立了上颌第二磨牙三维有限元生物力学分析模型,总节点为2 180 9个,4面单元数为14 44 9个。结论:所建模型结构完整,空间结构测量准确度高,单元划分精细,CT扫描建模技术的优点明显,所建立的模型使用性好。
Objective: To establish a three-dimensional finite element model of maxillary second molar. Methods: The isolated maxillary second molars were scanned by spiral CT. The cross-sectional images of the solid structures were digitized and processed into the computer to establish a solid three-dimensional finite element model. Results: The three-dimensional finite element model of maxillary second molar was established on a computer with a total of 21,809 nodes and 14 449 units. CONCLUSION: The model has complete structure, high accuracy of space structure measurement and fine unit division. The advantages of CT scanning modeling technology are obvious. The established model has good usability.